Question

i will give a medal and become a fan

Concrete can be purchased by the cubic yard. How much will it cost to pour a slab 11 feet by 11 feet by 3 inches for a patio if the concrete costs $63.00 per cubic yard? (1 point)
$211.75
$70.58
$317.63
$1,905.75
3. The volume of a cylinder is 980 in.3 The height of the cylinder is 20 in. What is the radius of the cylinder? (1 point)
7 in
49 in
327 in
18 in

Answer 1

i have no idea how many feet are ina yard and inches in a feet. If you tell me I will give you the answer

Answer 2

1 yd = 3 ft
1 ft = 12 in

Answer 3

1 foot = 12 inches 1 yard = 36 inches 1 yard = 3 feet

Answer 4

ok

Answer 5

first put everything in yards:
11 feet is 11/3 yards
3 inches is 3/36=1/12 yards
so the volume of the slab is: (11/3)*(11/3)*(1/12)=121/108 cubic yards. Since the cubic yard costs 63$, the prize will be (121/108)*63=70.58$

Answer 6

thank you you made that one look easier then it seems

Answer 7

for the 2º part:
volume of a cylinder is Area*hieght. Height you got = 20 in, volume too =980 cubic in. So:
980=area*20
from here area = 980/20=49 square in
area of a circle is = Pi r^2, where r is radius.
So 49=Pir^2
from here r^2=49/Pi=15,6
and r= 3.95

Answer 8

im pretty sure the radius is 7..

Answer 9

but I get 3.95.....

Answer 10

980 pie divided by 20 = 49
49 = R2
r=7

Answer 11

area of a circle is = Pi r^2

Answer 12

i just noticed the question up their didn't have the pi sign next to 980, but it does on my paper thats why you were calculating pie in the equation and i wasn't, sorry about that

Answer 13

:). Then it's = 7